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3 years ago

The value of (-7)2 is negative. True False

Mathematics

2 answers:

nexus9112 [7]3 years ago

5 0

Answer:

true multiplying a positive by a negative makes a negative number. think of it like flipping upside down. You will only be right side up if you flip upside down again after already being upside down.

fomenos3 years ago

3 0

Answer: True

Step-by-step explanation: A positive times a negative integer always equals a negative. That means (-7)2= -14

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Josh has a collection of 110 comic books. Eighty-two of the comic books feature superheroes. What percent of the comic books fea

IceJOKER [234]

So,

Josh has 110 comic books total, and 82 of them feature superheroes. To find the percentage, just divide 82 by 110.

$\frac{82}{110} = \frac{2*41}{2*5*11} = \frac{41}{55}$

$\frac{41}{55}=0.7\overline{45}$

To convert to a percent, just move the decimal place two places to the left and add a percent sign.

$0.7\overline{45} --\ \textgreater \ 74.\overline{54}\ percent$

Rounding, we get:

75%

So about 75% of Josh's comic books feature superheroes.

7 0

3 years ago

Read 2 more answers

whitney has a coin jar with a small collection of nickels and dimes. there are 69 coins in the jar. they have a value of $5.90.

Anastaziya [24]

Answer:

The number of nickels in the jar is 20.

The number of dimes in the jar is 49.

Step-by-step explanation:

Let us assume the total number of nickels = x

The total number of dimes = y

Total coins = 69 coins

⇒x + y = 69

Now as we know:

1 Nickel = $0.05

and 1 Dime = $0.10

⇒ The value of x nickels = x ( $0.05) = 0.05 x

and The value of y nickels = y ( $0.10) = 0.10 y

Total amount in jar = $5.90 ⇒0.05 x + 0.10 y = $5.90

So, the given system of equation is

x + y = 69 .............. (1)

0.05 x + 0.10 y = 5.90 ....... (2)

Substitute the value of y = 69 - x in (2) , we get:

0.05 x + 0.10 y = 5.90 ⇒ 0.05 x + 0.10 ( 69 - x) = 5.90

or, 0.05 x + 6.9 - 0.10 x = 5.90

or, - 0.05 x = -1.00

⇒ x = 1/0.05 = 20, or x = 20

⇒ y = 69 - x = 69 - 20 = 49

Hence the number of nickels in the jar is 20

and the number of dimes in the jar is 49.

8 0

3 years ago

892456899 times 123355668000652246743689754467

frez [133]

Answer:

110089616937935634106256206089690217833

Step-by-step explanation:

start with the largest number on top and rhe smaller one on the bottom, of course, as you multiply that way. then each time you finish with one number, cross it out to keep track and add a zeeo to the next line. third line is 2 zeroes, 4th line is 3 zeroes, 5th is 4 zeroes, etc. then add and youll get the final result??

3 0

3 years ago

Find the unit vector that has the same direction as the vector v. v = 3i + j

Alchen [17]

$\bf \textit{unit vector for \underline{v}}\qquad v=\ \textless \ a,b\ \textgreater \ \implies \stackrel{unit~vector}{\cfrac{a}{\sqrt{a^2+b^2}}~,~\cfrac{b}{\sqrt{a^2+b^2}}}\\\\
-------------------------------\\\\
v=3i+j\implies v=\ \textless \ 3,1\ \textgreater \ \implies \stackrel{unit~vector}{\cfrac{3}{\sqrt{3^2+1^2}}~,~\cfrac{1}{\sqrt{3^2+1^2}}}
\\\\\\
\left( \cfrac{3}{\sqrt{10}}~,~\cfrac{1}{\sqrt{10}} \right)$

5 0

3 years ago

Read 2 more answers

Please explain how you got this answer.

Tema [17]

150 times

out of the first 5 cards, there is a 3/5 chance of drawing a yellow.
if you replace the card and draw again, you still have a 3/5 chance of drawing a yellow card.
keep doing this process for 250 draws, each draw will always have 3/5 chance of drawing a yellow card.

so 3/5 +3/5 +3/5 +... (250 times) = 250 x 3/5 = 150

3 0

3 years ago